运营商的一种标准配置是使用一半的块来发送信号，另一半接收(即下行和上传通道)。
A standard configuration is for a carrier is to use half of each block to send a signal, and half to receive (outbound and inbound traffic).
大多数手持设备有它们自己的标准用来在数据通道上传送数据。
Most handheld devices have their own standards to deliver data over data channels.
可以使用 transferTo() 方法直接将字节从它被调用的通道上传输到另外一个可写字节通道上，数据无需流经应用程序。
You can use the transferTo() method to transfer bytes directly from the channel on which it is invoked to another writable byte channel, without requiring data to flow through the application.
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